CN108827004A - A kind of cement industry kiln hood fume afterheat gradient utilization system and method - Google Patents
A kind of cement industry kiln hood fume afterheat gradient utilization system and method Download PDFInfo
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- CN108827004A CN108827004A CN201810344973.5A CN201810344973A CN108827004A CN 108827004 A CN108827004 A CN 108827004A CN 201810344973 A CN201810344973 A CN 201810344973A CN 108827004 A CN108827004 A CN 108827004A
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- Prior art keywords
- flue gas
- economizer
- kiln hood
- aqc
- boiler
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
It includes grate-cooler, expansion chamber, AQC boiler and economizer that the present invention, which discloses a kind of cement industry kiln hood fume afterheat gradient utilization system and method, system,；Grate-cooler is provided with the different flue gas route of two thermal energy qualities：High thermal energy quality flue gas route and low calorie quality flue gas route；High thermal energy quality flue gas route is connected with expansion chamber and AQC waste heat boiler in turn by pipeline；Low calorie quality flue gas route is connected with economizer by pipeline；The exhanst gas outlet of AQC waste heat boiler is converged by pipeline and economizer exhanst gas outlet pipeline.Step afterheat utilizing system of the present invention is simple, utilization rate of waste heat is high and it is adaptable to change to operating condition, easy to promote and utilize.
Description
Technical field
The invention belongs to low-temperature flue gas energy-saving and emission-reduction field, in particular to a kind of cement industry kiln hood fume afterheat step benefit
Use system and method.
Background technique
Currently, cement industry kiln hood fume afterheat is mainly used for cement kiln head electricity generation system, concrete mode is：Grate-cooler
Two strands of flue gases of outlet merge through piping and enter heating boiler feed water in AQC waste heat boiler together, and which seems complete benefit
With the heat of flue gas, but substantially its utilization efficiency possesses very big room for promotion, and reason is：Grate-cooler goes out at kiln hood
Mouth flue-gas temperature is generally 350~450 DEG C；Grate-cooler is far from kiln hood exit flue-gas temperature generally at 120~200 DEG C；And pot
The temperature of furnace water supply only has 40~50 DEG C.Show that thermal energy can not all be converted to mechanical work according to thermodynamic study, with machinery
Energy, electric energy are compared, and heat quality is lower.Heat to power output efficiency is related with temperature height simultaneously, and the grade of high temperature heat is higher than low
Warm energy.Although two bursts of flue gas mixing increase the flow of flue gas, the high-grade of high-temperature flue gas is dragged down, this will lead to
The sharp fall of heat to power output efficiency.Meanwhile cement industry kiln hood low-temperature flue gas temperature is low, dustiness is big, corrosivity is strong, cigarette
Throughput is big, needs reasonable selection economizer.
Chinese patent application discloses CN 102,564,145 A, discloses one kind by the way that steam is arranged in tertiary-air pipe
Superheater utilizes the device of kiln hood fume afterheat, includes steam superheater and spray desuperheating device, by kiln hood waste heat boiler
It is sent into the middle pressure steam superheater being arranged in tertiary-air pipe with middle pressure steam caused by kiln tail waste heat boiler by pipeline,
After overheating, it is sent into Turbo-generator Set power generation.Although the invention improves the utilization of fume afterheat, but its device is complicated, pipe
Road is cumbersome, while to be equipped with steam temperature detection and adjustment equipment, higher cost, therefore inadaptable and quality coal in cement kiln systems is transformed.
Chinese patent application discloses CN 107,091,469 A, disclose it is a kind of by be transformed AQC boiler method come
The device of fume afterheat is improved, which includes high temperature and pressure waste heat boiler made of transformation and corresponding superheated steam dress
It sets, superheater, saturated vapor device, evaporator, hot water apparatus, preheater and boiler water-feeding device.By the way that boiler shape is transformed
At the energy cascade utilization and thermal energy coupling technique of cement energy-saving emission reduction, generating efficiency is improved.But this method equipment is more, structure
Complexity, reliability is low, consumes vast resources, while the high temperature and high pressure steam generated is higher to requirements for pipes, runs operating difficulties.
Summary of the invention
The purpose of the present invention is to provide a kind of cement industry kiln hood fume afterheat gradient utilization system and methods, to solve
Above-mentioned technical problem.The heat for two strands of flue gases that the system can be exported maximumlly using grate-cooler upstream and downstream, meanwhile, the step
Simply easily transformation, utilization rate of waste heat are high and adaptable to operating condition variation for afterheat utilizing system.Secondly, used economizer
Comply fully with the feature that low-temperature flue gas temperature is low, dustiness is big, corrosivity is strong.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of cement industry kiln hood fume afterheat gradient utilization system, including grate-cooler, expansion chamber, AQC boiler and province's coal
Device；Grate-cooler is provided with the different flue gas route of two thermal energy qualities：High thermal energy quality flue gas route and low calorie quality flue gas
Route；High thermal energy quality flue gas route is connected with expansion chamber and AQC waste heat boiler in turn by pipeline；Low calorie quality flue gas line
Road is connected with economizer by pipeline；The exhanst gas outlet of AQC waste heat boiler is converged by pipeline and economizer exhanst gas outlet pipeline.
Further, after the exhanst gas outlet of AQC waste heat boiler is converged by pipeline and economizer exhanst gas outlet pipeline successively
Connect kiln hood deduster and chimney.
Further, the economizer uses spiral fin coil or H-type finned tube.
Further, AQC waste heat boiler is connected with steam turbine.
Further, AQC boiler draws one boiler feedwater to economizer by pipeline, and economizer and grate-cooler are passed through in water supply
Low-temperature flue gas sufficiently exchanges heat, and the water after heat exchange for heating and/or is returned in AQC boiler drum by bypath system, most
It mixes to be heated by grate-cooler high-temperature flue gas with other boiler feedwaters eventually and generates steam.
Further, bypath system tube wall is enclosed with thermal insulation material.
A kind of cement industry kiln hood fume afterheat gradient utilization system, including：The high thermal energy quality flue gas route of grate-cooler
In high energy flue gas pass sequentially through expansion chamber and AQC waste heat boiler water supply in AQC waste heat boiler heated, generate steam and drive vapour
Turbine acting power generation；Flue gas in low calorie quality flue gas route passes through the part water supply that economizer introduces AQC waste heat boiler
Heating, is returned in QC boiler drum or as heating hot water.
Further, economizer discharge flue gas and AQC waste heat boiler discharge flue gas successively pass through kiln hood deduster and chimney
Discharge.
Compared with prior art, the invention has the following beneficial technical effects：
The present invention is based on the laws of thermodynamics, according to the height of thermal energy quality, with it respectively to the boiler feedwater of different temperatures
It is heated, realizes the cascade utilization of two strands of gas energies.The invention is different from the UTILIZATION OF VESIDUAL HEAT INs sides such as conventional transformation boiler
Formula has preferable heat utilization effect and industrial practice basis, can improve the power generation of cement furnace waste heat boiler to a certain degree
Efficiency.
Further, the present invention using by flue gas quality to it step by step in the way of, utilize low-temperature flue gas heating temperature
Low boiler feedwater, on the one hand boiler feedwater after heating can be connected by pipeline enters boiler drum, on the other hand can be with
It connects heat pump and carries out heating, realize the maximization of heat utilization and efficiency.
The method provided according to the present invention, the heat for the two strands of flue gases that can be maximumlly exported using grate-cooler upstream and downstream,
Meanwhile simply easily transformation, utilization rate of waste heat are high and adaptable to operating condition variation for the step afterheat utilizing system.Secondly, being made
Economizer is also fully consistent with the feature that low-temperature flue gas temperature is low, dustiness is big, corrosivity is strong.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of cement industry kiln hood fume afterheat gradient utilization system of the present invention.
In figure：Grate-cooler 1, expansion chamber 2, AQC boiler 3, economizer 4, kiln hood deduster 5, chimney 6, steam turbine 7, bypass
System 8.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
As shown in Figure 1, apparatus of the present invention main structure includes grate-cooler 1, expansion chamber 2, AQC boiler 3, economizer 4, kiln hood
Deduster 5, chimney 6, steam turbine 7 and bypath system 8.
Grate-cooler 1 is provided with the different flue gas route of two thermal energy qualities, high thermal energy quality flue gas route by pipeline according to
It is secondary to be connected with expansion chamber 2 and AQC waste heat boiler 3Low calorie quality flue gas route is connected with economizer 4 by pipeline.More than AQC
The outlet of heat boiler 3 is connected to by pipeline with 4 export pipeline of economizer, and high and low thermal energy quality flue gas two lines road is arranged in parallel
Exit passageway afterwards is sequentially connected kiln hood deduster 5 and chimney 6.
Draw one boiler feedwater to economizer 4, by sufficiently changing with 1 low-temperature flue gas of grate-cooler from AQC boiler 3 by pipeline
On the one hand heat, water after heat exchange can be used for heating, on the other hand may return in AQC boiler drum, finally and other
Boiler feedwater mixing is heated by 1 high-temperature flue gas of grate-cooler generates steam.
Economizer 4 uses spiral fin coil or H-type finned tube enhanced heat exchange in the present invention, and economizer 4 is in non-heating
Season is connected with AQC waste heat boiler 3, and economizer 4 provides after 1 low exit temperature flue gas of grate-cooler for AQC waste heat boiler 3
Boiler feedwater；It then utilizes bypath system 8 to connect with heat pump in heating season and hot water realization heating is provided.The bypass system
8 tube walls of uniting are enclosed with the thermal insulation materials such as silica wool, rock wool.
According to one, real example is tested, and initial data takes respectively：The high-temperature flue gas amount 65415m of grate-cooler 13/
H, enthalpy 732.88kJ/m3, the low-temperature flue gas amount 28035m of grate-cooler 13/ h, enthalpy 233.28kJ/m3, AQC waste heat boiler 3 gives
Water is 11.8t/h, and it is respectively 46.6 DEG C and 118.75 DEG C that economizer 4, which imports and exports water temperature, and exhaust gas temperature is before boiler economizer 4
160 DEG C, enthalpy 250kJ/m3；Steam turbine import main steam enthalpy is 3176.12kJ/kg, and steam exhaust-gas enthalpy is
2410.2kJ/kg generated output 6.1MW.Now extract 14017m3The exhaust gas volumn of/h makees cascade utilization, and remaining flue gas is directly sent
Waste heat boiler is crossed, remaining mixed flue gas amount is 79433m3/ h, flue gas enthalpy are 642.95kJ/m3.One is extracted from 4 import of economizer
Stock water supply is heated to 140 DEG C, simultaneously because 4 water supply of economizer is reduced, corresponding 4 exit water temperature of economizer will also be improved to 145
DEG C or so, eventually enter into the feed temperature of drum about at 141 DEG C, enthalpy 590kJ/kg.Then main-steam outlet enthalpy at this time
ForCalculating generated output is
Generating efficiency improvesIt can be seen that the gradient utilization system substantially increases power generation effect
Rate creates huge economic benefit for cement furnace factory.
Claims (8)
1. a kind of cement industry kiln hood fume afterheat gradient utilization system, which is characterized in that including grate-cooler (1), expansion chamber
(2), AQC boiler (3) and economizer (4)；
Grate-cooler (1) is provided with the different flue gas route of two thermal energy qualities：High thermal energy quality flue gas route and low calorie quality
Flue gas route；High thermal energy quality flue gas route is connected with expansion chamber (2) and AQC waste heat boiler (3) in turn by pipeline；Low calorie
Quality flue gas route is connected with economizer (4) by pipeline；
The exhanst gas outlet of AQC waste heat boiler (3) is converged by pipeline and economizer (4) exhanst gas outlet pipeline.
2. a kind of cement industry kiln hood fume afterheat gradient utilization system according to claim 1, which is characterized in that AQC
The exhanst gas outlet of waste heat boiler (3) is sequentially connected kiln hood deduster after converging by pipeline and economizer (4) exhanst gas outlet pipeline
(5) and chimney (6).
3. a kind of cement industry kiln hood fume afterheat gradient utilization system according to claim 1, which is characterized in that described
Economizer (4) uses spiral fin coil or H-type finned tube.
4. a kind of cement industry kiln hood fume afterheat gradient utilization system according to claim 1, which is characterized in that AQC
Waste heat boiler (3) is connected with steam turbine (7).
5. a kind of cement industry kiln hood fume afterheat gradient utilization system according to claim 1, which is characterized in that AQC
Boiler (3) draws one boiler feedwater to economizer (4) by pipeline, and water supply is by economizer (4) and grate-cooler (1) low-temperature flue gas
Sufficiently heat exchange, water after heat exchange for heating and/or are returned in AQC boiler drum by bypath system (8), finally and its
His boiler feedwater mixing is heated by grate-cooler (1) high-temperature flue gas generates steam.
6. a kind of cement industry kiln hood fume afterheat gradient utilization system according to claim 5, which is characterized in that bypass
System (8) tube wall is enclosed with thermal insulation material.
7. a kind of cement industry kiln hood fume afterheat stepped utilization method, which is characterized in that based on any in claim 1 to 6
A kind of cement industry kiln hood fume afterheat gradient utilization system described in, including：The high thermal energy quality flue gas line of grate-cooler (1)
High energy flue gas in road passes sequentially through expansion chamber (2) and AQC waste heat boiler (3) and heats to water supply in AQC waste heat boiler (3), produces
Raw steam drives steam turbine acting power generation；Flue gas in low calorie quality flue gas route is by economizer (4) to AQC waste heat boiler
(3) the part water supply heating introduced, is returned in QC boiler drum or as heating hot water.
8. a kind of cement industry kiln hood fume afterheat stepped utilization method according to claim 7, which is characterized in that save coal
Device (4) discharge flue gas and AQC waste heat boiler (3) discharge flue gas successively pass through kiln hood deduster (5) and chimney (6) discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810344973.5A CN108827004A (en) | 2018-04-17 | 2018-04-17 | A kind of cement industry kiln hood fume afterheat gradient utilization system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810344973.5A CN108827004A (en) | 2018-04-17 | 2018-04-17 | A kind of cement industry kiln hood fume afterheat gradient utilization system and method |
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| CN108827004A true CN108827004A (en) | 2018-11-16 |
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| CN201810344973.5A Pending CN108827004A (en) | 2018-04-17 | 2018-04-17 | A kind of cement industry kiln hood fume afterheat gradient utilization system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631594A (en) * | 2018-11-28 | 2019-04-16 | 北京建筑材料科学研究总院有限公司 | The grate-cooler and discarded heat content recoverying and utilizing method that exhaust gas heat content recycles |
| CN109855433A (en) * | 2019-03-28 | 2019-06-07 | 成都建筑材料工业设计研究院有限公司 | It is a kind of to heat Turbo-generator Set condensate system using cement kiln low temperature exhaust heat |
| CN110017694A (en) * | 2019-05-07 | 2019-07-16 | 周红 | A kind of residual heat from kiln furnace cascade utilization device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307893A (en) * | 2013-06-21 | 2013-09-18 | 成都建筑材料工业设计研究院有限公司 | Waste heat recovery system of grate cooler |
| CN203298623U (en) * | 2013-05-16 | 2013-11-20 | 华效资源有限公司 | Cement clinker grate cold machine exhaust gas waste heat recycling and matching waste heat power generation system |
| JP2017057122A (en) * | 2015-09-18 | 2017-03-23 | 太平洋セメント株式会社 | Apparatus and method for treating cement kiln exhaust gas |
| CN106640221A (en) * | 2016-10-10 | 2017-05-10 | 南京凯盛开能环保能源有限公司 | Efficient cement kiln waste heat recovery and power generation system and method |
| CN107631640A (en) * | 2017-11-02 | 2018-01-26 | 中冶赛迪工程技术股份有限公司 | A kind of electric furnace residual neat recovering system and method |
-
2018
- 2018-04-17 CN CN201810344973.5A patent/CN108827004A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203298623U (en) * | 2013-05-16 | 2013-11-20 | 华效资源有限公司 | Cement clinker grate cold machine exhaust gas waste heat recycling and matching waste heat power generation system |
| CN103307893A (en) * | 2013-06-21 | 2013-09-18 | 成都建筑材料工业设计研究院有限公司 | Waste heat recovery system of grate cooler |
| JP2017057122A (en) * | 2015-09-18 | 2017-03-23 | 太平洋セメント株式会社 | Apparatus and method for treating cement kiln exhaust gas |
| CN106640221A (en) * | 2016-10-10 | 2017-05-10 | 南京凯盛开能环保能源有限公司 | Efficient cement kiln waste heat recovery and power generation system and method |
| CN107631640A (en) * | 2017-11-02 | 2018-01-26 | 中冶赛迪工程技术股份有限公司 | A kind of electric furnace residual neat recovering system and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631594A (en) * | 2018-11-28 | 2019-04-16 | 北京建筑材料科学研究总院有限公司 | The grate-cooler and discarded heat content recoverying and utilizing method that exhaust gas heat content recycles |
| CN109855433A (en) * | 2019-03-28 | 2019-06-07 | 成都建筑材料工业设计研究院有限公司 | It is a kind of to heat Turbo-generator Set condensate system using cement kiln low temperature exhaust heat |
| CN110017694A (en) * | 2019-05-07 | 2019-07-16 | 周红 | A kind of residual heat from kiln furnace cascade utilization device and method |
| CN110017694B (en) * | 2019-05-07 | 2024-02-13 | 周红 | Kiln waste heat cascade utilization device and method |
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Application publication date: 20181116 |
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